Mozilla Firefox: security vulnerability (CVE-2014-1491)
Published Sources: CVE.org
What is affected, what to do
Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value.
An exploit is publicly available. Update Mozilla Firefox to version 24.3, Mozilla Firefox to version 27.0, Mozilla Network Security Services to version 3.15.4.
- Affected
- Mozilla Firefox
lt *..24.3 - Mozilla Firefox
lt *..27.0 - Mozilla Network Security Services
lt *..3.15.4 - Mozilla Seamonkey
lt *..2.24 - Mozilla Thunderbird
lt *..24.3.0 - Oracle Enterprise Manager Ops Center
lt *..12.1.4 - Oracle Enterprise Manager Ops Center
eq 12.2.0..12.2.0 - Oracle Enterprise Manager Ops Center
eq 12.2.1..12.2.1 - Oracle Enterprise Manager Ops Center
eq 12.3.0..12.3.0 - Oracle VM Server for x86
eq 3.2..3.2 - Fedora
eq 19..19 - Fedora
eq 20..20 - OpenSUSE
eq 11.4..11.4 - OpenSUSE
eq 12.3..12.3 - OpenSUSE
eq 13.1..13.1 - SUSE Linux Enterprise Desktop
eq 11..11 - SUSE Linux Enterprise Server
eq 11..11 - SUSE Linux Enterprise Software Development Kit (SDK)
eq 11..11 - Debian Linux
eq 7.0..7.0 - Debian Linux
eq 8.0..8.0 - Canonical Ubuntu Linux
eq 12.04..12.04 - Canonical Ubuntu Linux
eq 12.10..12.10 - Canonical Ubuntu Linux
eq 13.10..13.10
- Mozilla Firefox
- Fixed in
- Mozilla Firefox
24.3 - Mozilla Firefox
27.0 - Mozilla Network Security Services
3.15.4 - Mozilla Seamonkey
2.24 - Mozilla Thunderbird
24.3.0 - Oracle Enterprise Manager Ops Center
12.1.4
- Mozilla Firefox
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Metrics
—
Priority
No value is available for this vulnerability.
—
CVSS v3
No value is available for this vulnerability.
4.6 %
EPSS score
Moderate — model estimates 1-10% exploitation likelihood.
Source: FIRST EPSS, percentile 91.6
Show all metrics
- Severity
- Not rated
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 67.15 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- PoC (publicly reported)
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 4.6 %
- Moderate — model estimates 1-10% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 91.6
- Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value.
Source: NVD (NIST), cvelistv5
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| mozilla | firefox |
|
|
| mozilla | network_security_services |
|
|
| mozilla | seamonkey |
|
|
| mozilla | thunderbird |
|
|
| oracle | enterprise_manager_ops_center |
|
|
| oracle | vm_server |
|
|
Vendors and products
- Canonical Canonical Ubuntu Linux
- Debian Debian Linux
- Fedora Project Infrastructure Fedora
- Mozilla Mozilla Firefox
- Mozilla Mozilla NSS
- Mozilla Mozilla Seamonkey
- Mozilla Mozilla Thunderbird
- openSUSE OpenSUSE
- Oracle Oracle Enterprise Manager Ops Center
- Oracle Oracle VM Server for x86
- SUSE SUSE Linux Enterprise Desktop
- SUSE SUSE Linux Enterprise Server
Affected operating systems
| Linux | debian | debian_linux | 7.0 |
| Linux | debian | debian_linux | 8.0 |
| Linux | suse | linux_enterprise_desktop | 11 |
| Linux | suse | linux_enterprise_server | 11 |
| Linux | suse | linux_enterprise_software_development_kit | 11 |
| Linux | opensuse | opensuse | 11.4 |
| Linux | opensuse | opensuse | 12.3 |
| Linux | opensuse | opensuse | 13.1 |
| Linux | canonical | ubuntu_linux | 12.04 |
| Linux | canonical | ubuntu_linux | 12.10 |
| Linux | canonical | ubuntu_linux | 13.10 |
| Other | fedoraproject | fedora | 19 |
| Other | fedoraproject | fedora | 20 |
Public exploit references
Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.
| Reference tagged as exploit | bugzilla.mozilla.org (opens in a new tab) | PoC (publicly reported)reported, not verified | — |
References & sources
- ubuntu.comUSN-2119-1Vendor advisory, x_refsource_UBUNTU, Third-party advisory
- oracle.comtechnetwork/topics/security/ovmbulletinjul2016-3090546.htmlx_refsource_CONFIRM, Third-party advisory
- securitytracker.com1029721Vulnerability database, x_refsource_SECTRACK, Third-party advisory, Vulnerability database
- hg.mozilla.orgprojects/nss/rev/12c42006aed8x_refsource_CONFIRM, Patch, Vendor advisory
- lists.opensuse.orgopenSUSE-SU-2014:0212Vendor advisory, x_refsource_SUSE, Mailing list, Third-party advisory
- exchange.xforce.ibmcloud.comfirefox-nss-cve20141491-unspecified(90886)Vulnerability database, x_refsource_XF, Third-party advisory, Vulnerability database
- securitytracker.com1029717Vulnerability database, x_refsource_SECTRACK, Third-party advisory, Vulnerability database
- vmware.comsecurity/advisories/VMSA-2014-0012.htmlx_refsource_CONFIRM, Not applicable
- debian.orgDSA-2994Vendor advisory, x_refsource_DEBIAN, Third-party advisory
- securityfocus.com65332Vulnerability database, x_refsource_BID, Third-party advisory, Vulnerability database
- secunia.com56922Third-party advisory, x_refsource_SECUNIA, Third-party advisory
- bugzilla.mozilla.orgshow_bug.cgi?id=934545x_refsource_CONFIRM, Exploit, Issue tracking, Patch, Vendor advisory
- securitytracker.com1029720Vulnerability database, x_refsource_SECTRACK, Third-party advisory, Vulnerability database
- secunia.com56858Third-party advisory, x_refsource_SECUNIA, Third-party advisory
- oracle.comtechnetwork/topics/security/cpujan2016-2367955.htmlx_refsource_CONFIRM, Third-party advisory
- debian.orgDSA-2858Vendor advisory, x_refsource_DEBIAN, Third-party advisory
- securityfocus.com20141205 NEW: VMSA-2014-0012 - VMware vSphere product updates address security vulnerabilitiesMailing list, x_refsource_BUGTRAQ, Not applicable
- oracle.comtechnetwork/topics/security/cpujan2015-1972971.htmlx_refsource_CONFIRM, Third-party advisory
- ubuntu.comUSN-2102-2Vendor advisory, x_refsource_UBUNTU, Third-party advisory
- security.gentoo.orgGLSA-201504-01Vendor advisory, x_refsource_GENTOO, Third-party advisory
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<a href="https://intel.neosec.eu/en/cve/CVE-2014-1491"><img src="https://intel.neosec.eu/badge/cve/CVE-2014-1491.svg?lang=en" alt="CVE-2014-1491 – NEOSEC Intel" height="20"></a>